What is the value of 0.\(\overline{4}\) + 0.\(\overline{2}\) ?
\( \frac{7}{8} \)
\( \frac{6}{7} \)
\( \frac{2}{3} \)
\( \frac{8}{9} \)
Hiten marks his pen at Rs. 15,625 and after allowing discount of 20 percent, he still earns 25 percent profit. What is the cost price of the pen?
Find the rate of discount when the marked price is โน 2,280 and the selling price is โน 1,482.